Flag it from your Business Profile, wait for Google's decision, and if it comes back with no violation found, you may be eligible for one appeal, and only one. The flag asks Google to look. The appeal is where you name the policy and say who the writer is.
Nothing about the flag is special to a competitor. Google's steps are the same for any review, and Google says evaluation typically takes several days. The Reviews Management Tool then shows Decision pending until Google looks, and Report reviewed - no policy violation if the review stays up. Escalated - check your email for updates only appears after an appeal.
Google's help page names two example reasons, spam and profanity. In June 2025, Local Search Forum members found a Conflict of interest reason in some accounts and not others. If yours has it, use it. If not, in our read Off-topic is the closest match. You can look over the report reasons Google's menu offers before you pick.
The appeal carries the argument. In our read it names Rating Manipulation, quotes the clause, and then says in plain sentences who the reviewer is to your business. Name a policy that doesn't fit that argument and you can waste the one appeal by presenting the wrong policy argument, so read how to spend the one appeal first. You file it from your own profile. We never submit anything to Google.
Two threads show one more step, a Product Expert escalating the review. In April 2023 a physiotherapy clinic posted a review in Google's Business Profile Help Community. The review promoted a rival practitioner. The clinic said the writer had never been a customer. It came down about five days after a Product Expert escalated it. In October 2025 a marketing agency got "no policy violation" through support for months, then saw the review removed two days after a Product Expert escalated it.